A linking verb is a verb that describes the subject by connecting it to a predicate adjective or predicate noun
Last night -yes
With his friends -no
And won -no
Exciting and challenging -no
Last one is the best answer
I would suggest the internet, there are tons of websites out there that contain tons of research regarding tourist sites in Alaska. However, since there are some unreliable sites out there, check out travel magazines and etc with a focus on Alaska that might help you!